0c4c47f88d
Abstract the logic from simg2img into libsparse, and add logic for reading a regular image into libsparse. simg2img then becomes a simple wrapper around libsparse. img2simg was not actually making the file sparse, it was using sparse files to create multiple files that could be pieced back together. Replace it with a simple wrapper around libsparse. Its functionality will be replaced by an simg2simg that can resparse a file into smaller chunks. Change-Id: I266f70e1c750454183ce46c71a7bb66bbb033a26
116 lines
2.4 KiB
C
116 lines
2.4 KiB
C
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define _FILE_OFFSET_BITS 64
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#define _LARGEFILE64_SOURCE 1
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#include <fcntl.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <sparse/sparse.h>
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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#if defined(__APPLE__) && defined(__MACH__)
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#define lseek64 lseek
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#define off64_t off_t
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#endif
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void usage()
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{
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fprintf(stderr, "Usage: img2simg <raw_image_file> <sparse_image_file> [<block_size>]\n");
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}
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int main(int argc, char *argv[])
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{
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int in;
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int out;
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unsigned int i;
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int ret;
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struct sparse_file *s;
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unsigned int block_size = 4096;
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off64_t len;
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if (argc < 3 || argc > 4) {
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usage();
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exit(-1);
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}
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if (argc == 4) {
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block_size = atoi(argv[3]);
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}
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if (block_size < 1024 || block_size % 4 != 0) {
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usage();
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exit(-1);
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}
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if (strcmp(argv[1], "-") == 0) {
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in = STDIN_FILENO;
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} else {
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in = open(argv[1], O_RDONLY | O_BINARY);
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if (in < 0) {
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fprintf(stderr, "Cannot open input file %s\n", argv[1]);
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exit(-1);
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}
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}
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if (strcmp(argv[2], "-") == 0) {
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out = STDOUT_FILENO;
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} else {
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out = open(argv[2], O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0664);
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if (out < 0) {
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fprintf(stderr, "Cannot open output file %s\n", argv[2]);
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exit(-1);
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}
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}
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len = lseek64(in, 0, SEEK_END);
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lseek64(in, 0, SEEK_SET);
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s = sparse_file_new(block_size, len);
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if (!s) {
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fprintf(stderr, "Failed to create sparse file\n");
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exit(-1);
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}
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sparse_file_verbose(s);
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ret = sparse_file_read(s, in, false, false);
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if (ret) {
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fprintf(stderr, "Failed to read file\n");
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exit(-1);
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}
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ret = sparse_file_write(s, out, false, true, false);
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if (ret) {
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fprintf(stderr, "Failed to write sparse file\n");
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exit(-1);
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}
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close(in);
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close(out);
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exit(0);
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}
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